Unannounced visit to Springbrook Farms of Marshall, IndianaDairy Agenda Todays Dallas Burton made an unannounced visit to Springbrook Farms of Marshall, Indiana. Indiana will be the focus of the U.S. Registered Holstein Industry July 7th - 11th as the 2013 National Holstein Convention takes place in Indianapolis, Indiana. Enjoy a brisk walk through the barn at Springbrook Farms and view some of their tremendous consignments to the National Convention Sale.